I have a 2006 Expedition Limited with 165,000 miles on it. I don't think the transmission has ever had any work done to it. When I'm going about 60 MPH and try to accelerate, I can feel the car jerking a little...for the longest time I just though I was hitting bumps on the road until recently I figured out that I "hit bumps" everytime I accelerate past 60! Lol! So its the transmission. Also when I'm going about 60 and I floor it, the transmission slips REALLY bad. I've almost got into accidents trying to pass someone because my transmission slips and my engine just revs up like if it was in neutral. What do you guys think the issue is?